Home / 1,542.17-2,128.19-843.55

Finding the Fourth Proportional to 1,542.17, 2,128.19 and 843.55

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Solution

The fourth proportional to 1,542.17, 2,128.19 and 843.55 is: 1,164.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,542.17 : 2,128.19 = 843.55 : x
  2. Step 2: Convert to fraction form
    1,542.17/2,128.19 = 843.55/x
  3. Step 3: Cross multiply
    1,542.17x = 2,128.19 × 843.55
  4. Step 4: Simplify right side
    1,542.17x = 1,795,229.88
  5. Step 5: Solve for x
    x = 1,795,229.88/1,542.17
  6. Step 6: Final answer
    x = 1,164.09

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.